package com.wugui.datax.admin.tool.meta;

/**
 * meta信息interface
 *
 * @author zhouhongfa@gz-yibo.com @ClassName BaseDatabaseMeta @Version 1.0
 * @since 2019/7/17 15:45
 */
public abstract class BaseDatabaseMeta implements DatabaseInterface {

  @Override
  public String getSQLQueryFields(String tableName) {
    return "SELECT * FROM " + tableName + " where 1=0";
  }

  @Override
  public String getSQLQueryTablesNameComments() {
    return "select table_name,table_comment from information_schema.tables where table_schema=?";
  }

  @Override
  public String getSQLQueryTableNameComment() {
    return "select table_name,table_comment from information_schema.tables where table_schema=? and table_name = ?";
  }

  @Override
  public String getSQLQueryPrimaryKey() {
    return null;
  }

  @Override
  public String getSQLQueryComment(String schemaName, String tableName, String columnName) {
    return null;
  }

  @Override
  public String getSQLQueryColumns(String... args) {
    return null;
  }

  @Override
  public String getMaxId(String tableName, String primaryKey) {
    return String.format("select max(%s) from %s", primaryKey, tableName);
  }

  @Override
  public String getSQLQueryTableSchema(String... args) {
    return null;
  }

  @Override
  public String getSQLQueryTables() {
    return null;
  }

  @Override
  public String getSQLQueryTables(String... tableSchema) {
    return null;
  }
}
